62156-62-1Relevant academic research and scientific papers
Iodine-Catalyzed Iso-Nazarov Cyclization of Conjugated Dienals for the Synthesis of 2-Cyclopentenones
Marsili, Lucía A.,Pergomet, Jorgelina L.,Gandon, Vincent,Riveira, Martín J.
supporting information, p. 7298 - 7303 (2018/11/25)
Molecular iodine was identified as an efficient catalyst for the cycloisomerization of conjugated dienals to substituted 2-cyclopentenones. DFT calculations suggested an unexpected concerted character for this cyclization.
Reaction of Alkynes with Cyclopropylcarbene-Chromium Complexes: A Versatile Cycloaddition Reaction for the Construction of Cyclopentenones
Tumer, Seniz U.,Herndon, James W.,McMullen, Leonard A.
, p. 8394 - 8404 (2007/10/02)
The scope and limitations of the reaction between cyclopropylcarbene-chromium complexes and alkynes have been examined.A variety of cyclopropylcarbene complexes and alkynes have been employed in these studies.The reaction appears to be general for most simple alkynes, producing cyclopentenones.A mechanism has been proposed involving metallacyclobutene formation, electrocyclic ring opening, electrocyclic ring closure, CO insertion, alkene insertion, metallacyclopentene fragmentation and cyclopentadienone reduction.The presence of these intermediates has been inferred from the structure of products obtained when the reaction was conducted in acetonitrile instead of dioxane.A trapping experiment employing 1,6-heptadiyne supports the intermediacy of vinylcarbene or vinylketene complexes.
Carbonylation of Enynes under Hydroformylation Conditions Catalyzed by Rhodium Carbonyl. A New Method for Synthesis of Cyclic Enones
Doyama, Kazuo,Joh, Takashi,Shiohara, Tomoo,Takahashi, Shigetoshi
, p. 4353 - 4360 (2007/10/02)
The reactivities of 1-buten-3-yne derivatives toward hydroformylation were studied using a rhodium catalyst.Unexpectedly, cyclopentenone derivatives were obtained in moderate yields together with formyl-substituted dienes and unsaturated lactones.This rea
HYDROFORMYLATION AND HYDROCARBONYLATION OF ENYMES BY RHODIUM CARBONYL CLUSTER: A NEW ROUTE TO CYCLIC ENONES
Doyama, Kazuo,Joh, Takashi,Takahashi, Shigetoshi
, p. 4497 - 4500 (2007/10/02)
The reaction of but-1-en-3-yne derivates with carbon monoxide and hydrogen in the presence of Rh4(CO)12 catalyst gave formyl-dienes, cyclopentenones and unsaturated lactones, which shows the CC is much more reactive than the C=C moiety and may provide
